Quick answer: Go to Email Verification (or select contacts in Contacts), upload or choose your list, pick a method — SMTP (Standard), Deep Check, or Ping (Quick) — and start the job. OutreachBox returns a quality score (Excellent, Good, Risky, Bad) for each address so you can remove the bad ones before sending.
Bulk address verification checks a list before you send, which protects sender reputation and keeps bounce rates low. OutreachBox supports single checks and list jobs with SMTP (Standard), Deep Check, and Ping (Quick).
Before you start
Prepare the list and check available verification usage. Keep the source list so you can compare results and record when verification ran.
Practical example
Verify a new list, exclude invalid addresses, and review uncertain results separately. Recheck older addresses close to the send date rather than relying on an old result.
Check your result
Catch-all domains and provider restrictions can make a result uncertain. Verification reduces avoidable failures but does not guarantee delivery, inbox placement, or recipient interest.
How to verify emails
Single verification
- Go to Email Verification.
- Enter an email address.
- Choose a method and click Verify to see the result.
Bulk verification
- Go to Email Verification and start a New Verification Job (or select contacts and Verify Selected).
- Upload a CSV or choose your contacts.
- Select a verification method.
- Start the job and monitor progress.
- Download or review the results.
Verification methods
| Method | Speed | Accuracy | Best for |
|---|---|---|---|
| SMTP (Standard) | Fast | Good | Everyday verification |
| Deep Check | Slower | Highest | Important lists; catch-all, disposable, role detection |
| Ping (Quick) | Fastest | Lower | Quick passes on large lists |
Reading the results
Each address gets a quality score and details:
- Excellent / Good — safe to send.
- Risky — send with caution.
- Bad — remove before sending.
- Details include disposable, role-based, and free-provider flags, catch-all detection, and the verification reason.
Best practices
- Verify before every campaign, and re-verify lists periodically.
- Use Deep Check for important or older lists.
- Remove Bad and most Risky addresses to protect deliverability.
- Watch your verification usage against your plan limits.
Frequently Asked Questions
Which verification method should I use?
Use SMTP (Standard) for routine checks, Deep Check for important lists where accuracy matters most, and Ping (Quick) for fast passes on very large lists.
What do the quality scores mean?
Excellent and Good are safe to send; Risky should be treated cautiously; Bad addresses are invalid or problematic and should be removed.
Why is verification failing?
Check the email format, confirm you haven't exceeded your verification limit, review error messages, and try a different method.
Related articles
Verify before you send — clean lists are the cheapest deliverability upgrade you can make.